ISL68200 Datasheet, PDF (25/32 Pages) Intersil Corporation – Single-Phase R4 Digital Hybrid PWM Controller with Integrated Driver

ISL68200
COMMAND
CODE
01h[7:0]
ACCESS
R/W
02h[7:0]
R/W
03h
20h[7:0]
SEND BYTE
R
21h[2:0]
R/W
24h[15:0]
R/W
33h[15:0]
R/W
78h[8:0]
R
88h[15:0]
R
8Bh[15:0]
R
8Ch[15:0]
R
WORD
LENGTH
(BYTE)
ONE
ONE
N/A
ONE
TWO
TWO
TWO
ONE
TWO
TWO
TWO
TABLE 11. SMBus, PMBus, AND I²C SUPPORTED COMMANDS
DEFAULT
VALUE
COMMAND NAME
DESCRIPTION
80h
OPERATION
VR Enable (depending upon ON_OFF_CONFIG configuration):
Bit[7]: 0 = OFF (0-F); 1 = ON (80-8Fh)
Bit[6:4] = 0
Bit[3:0] = Don’t care
1Fh
ON_OFF_CONFIG Configure VR Enabled by OPERATION and/or EN pin:
Bit[7:5] = 0
Bit[4] = 1
Bit[3] = OPERATION command Enable
0h = OPERATION command has no control on VR
1h = OPERATION command can turn ON/OFF VR
Bit[2] = CONTROL pin Enable
0h = EN Pin has no control on VR
1h = EN pin can turn ON/OFF VR
Bit[1] = 1
Bit[0] = 1
Bit[3:2] = 00b = 13h (ALWAYS ON)
Bit[3:2] = 01b = 17h (EN controls VR)
Bit[3:2] = 10b = 1Bh (OPERATION controls VR)
Bit[3:2] = 11b = 1Fh (EN and OPERATION control VR)
CLEAR_FAULTS Clear faults in status registers
19h
VOUT_MODE
Set host format of VOUT command.
Always Linear Format: N = -7
PROG1[7:0]
VBOOT+500mV
VOUT_COMMAND
VOUT_MAX
Set output voltage
HEX Code = DEC2HEX [ROUND(V_OUT/2^-7)]
Set maximum output voltage that VR can command
(DAC ≤ VOUT_MAX). Linear Format. N = -7
HEX Code = DEC2HEX(ROUNDUP(VOUT_MAX/ 2^-7)
PROG3[5:3]
FREQUENCY_SWITCH
Set VR Switching Frequency (In Linear Format)
Support 8 options (N = 0):
12Ch = 300kHz; 190h = 400kHz; 1F4h = 500kHz
258h = 600kHz; 2BCh = 700kHz; 352h = 850kHz
3E8h = 1MHz; 5DCh = 1.5MHz*
* Very high frequency is not recommended for very high duty cycle
applications as the boot capacitor will not has enough time to be
charged due to low LGATE ON time.
STATUS_BYTE
Fault Reporting;
Bit7 = Busy
Bit6 = OFF (Reflect current state of operation and ON_OFF_CONFIG
registers as well as VR Operation)
Bit5 = OVP
Bit4 = OCP
Bit3 = 0
Bit2 = OTP
Bit1 = Bus communication error
Bit0 = NONE OF ABOVE (OUTPUT UVP, VOUT_COMAND >
VOUT_MAX, or VOUT OPEN SENSE)
READ_VIN
READ_VOUT
Input Voltage (N = - 4, Max = 31.9375V)
VIN (V) = HEX2DEC(88 hex data - E000h) * 0.0625V
VR Output Voltage, Resolution = 7.8125mV = 2^-7
VOUT (V) = HEX2DEC(8B hex data) * 2^-7
READ_IOUT
VR Output Current (N = -3, IMAX = 63.875A)
IOUT (A) = HEX2DEC(8C hex data-E800) * 0.125A when IOUT pin
voltage = 2.5V at 63.875A load.
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FN8705.1
March 7, 2016